Machine for remaking wire-drawing dies.



N. K. TUBNBULL. MAGHINE FOR REMAKING WIRE DRAWING DIES. APPLICATIONFILED MAR. 4, 1911.

1 28,305. Patented Juhe 4, 1912.

5 SHEETS-SHEET l.

N. K. TURNBULL. MAGHINE FOR RBMAKING WIRE DRAWING DIES.

APPLICATION FILED MAR. 4, 1911. 1,028,305. Patented June 4, 1912.

5 BHEETSSHEET 2.

COLUMBIA PLANOGRAPII CO" WASHINGTO D. c.

, N. K. TURNBULL. MACHINE FOR REMAKING WIRE DRAWING DIES. APPLICATIONFILED MAR. 4, 1911.

1,028,305., I Patented June 4, 1912.

5 SHEETS-SHEET 3.

N K. TURNBULL. MACHINE FOR REMAKING WIRE DRAWING DIES.

APPLICATION FILED MAR. 4, 1911. 1,028,305. Patented June 4, 1912.

5 SHEETS-SHEET 4.

N. K. TURNBULL.

MACHINE FOB. REMAKING WIRE DRAWING 1313s.

APPLICATION FILED MAR. 4, 1911.

1,028,305, Patented June 4, 1912.

5 SHEETS-SHEET 5.

W16. r K I WW v COLUMBIA PLANOGRAPH 60., wAsmNuTnN, n. c

NICHOLAS KING TURNBULL, OF MANCHESTER, ENGLAND.

MACHINE FOB REIVIAKING WIRE-DRAWING DIES.

Specification of Letters Patent.

Patented June at, 1912.

Application filed. March 4, 1911. Serial No. 612,387.

To all whom it may concern:

Be it known that I, NIoHoLAs KING TURN- BULL, a subject of the King ofGreat Britain, residing at Wire Works, Trafford Park, Manchester, in thecounty of Lancaster, England, have invented certain new and usefulImprovements in Machines for Bemaking Wire Drawing Dies, of which thefollowing is a specification.

This invention relates to a machine that is more particularly applicablefor hammering large plates or dies, also plates or dies having a numberof rows of eyes. The last mentioned plates in addition to being hammeredaround the various eyes, require to be hammered in lines between therows of eyes in order to relieve the strain that is set up in the plateby hammering the same around its eyes. This strain if not relieved, isliable to result in the plate becoming cracked and consequently spoiled.

According to this invention the machine is so constructed and arrangedthat in effecting the hammering process the hammer is moved in a curvedpath around the eye or eyes of the plate or die and in some cases inaddition to describing the said path around the eyes of the plate ordie, the said curved path is described between such eyes byautomatically or otherwise causing the plate to be traversed to and froin relation to the path described by the hammer with the result that theblows will be delivered in overlapping circles or curves which willpractically cover the whole surface of the plate. A convenient form ofmechanism for causing the hammer to describe a spiral path in relationto the die or plate consists in ecoentrically mounting a pneumatic orother appropriate hammer in a tube or hearing that is eccentrically androtatably mounted in another tube or bearing, each tube or bearing beingcapable of rotation about its own axis at a different relative speed,with the result that the hammer is caused to described an approximatelyspiral path which may extend around the eye of the die or plate.= Ifdesired the mechanism may be adjusted to cause the hammer to describe acircular path and by traversing the said plate in relation to the pathdescribed by the hammer, the blows are delivered in a series ofapproximately circular or similar paths which overlap each other inaccordance with the relative speed of the hammer moving mechanism andthe speed at which the plate is traversed. The hammer is advantageouslymade with a cylindrical holding portion arranged to lit the bore of theinner tube or bearing, the outer circumference of which is formedeccentric to the bore. This inner bearing is advantageously arranged tofit the bore of the outer tube or bearing which is also formed with anouter circumference situated eccentrically in relation to its bore, anysuitable gearing being employed for imparting the required rotarymovements to the tubes or bearings and also to the cylindrical portionof the hammer if the latter were mounted eccentrically thereto. Themotive fluid to the hammer may be controlled in any convenient manner;or I may provide appropriate mechanism whereby the motive fluid iscontrolled by the act of bringing the die or die plate into thehammering position. F or example I may provide a floating lever, (z'. 6.one that has a displaceable fulcrum) which operates in conjunction withsuitable mechanism for varying the position of the valves that controlthe motive fluid.

Means may be provided for supporting the tool of the hammering machinein its raised position when at rest; these means consisting of ametallic spring or an air cushion.

The portion of the machine that supports the die or the die plate may beraised to the working posit-i011 by any suitable mechanical or pneumaticmeans such for example as a cam or crank or an air controlled piston.

In order that the said invention may be clearly understood and readilycarried into effect, I will describe the same more fully with referenceto the accompanying drawings in which Figure 1 is a front elevation of adie and plate hammering machine constructed in accordance with thisinvention. Fig. 2 is a vertical side section of the machine. Fig. 3 is atransverse section taken approximately on line 3, 3, of Fig. 2. Figs. atand 5 are similar views taken approximately on lines at, 4 and 5, 5 ofFig. 2. Figs. 6, 7 and S are cross sect-ions taken through the inner,intermediate and outer tubes, showing three adjustments of theintermediate tube. Figs. 9, 10 and 11 are diagrammatic views of spiralpaths described by the hammer in accordance with the said adjustments.Figs. 12 and 13 are diagrammatic views of circular paths described bythe hammer, the small circles indicating the hammer indentations. Fig.14 is a transverse section taken on lines 14, 14 of Fig. 1. Fig. 15 is avertical side section of a sufficient part of the machine to illustratethe hammer operating and controlling gear. Fig. 16 is a detachedsect-ion of the hammer controlling valve taken at right angles to thatshown in Fig. 15. Fig. 17 is a vertical section of part of Fig. 15 takenapproximately on line 17, 17 of that figure. Fig. 18 is a detached viewof part of Fig. 2 showing in section an attachment to the machine forenabling the latter to hammer around and between the eyes of a die platehaving a numberof rows of eyes. Fig. 19 is a transverse section takenapproximately on line 19, 19 of Fig. 2, and Fig. 20 is a diagrammaticview of a path described by the hammer between the rows of eyes of thedie plate.

A represents the pneumatic hammer. A the cylindrical holding portionthereof, B the die, C the die plate, D the inner tube or bearing, E theintermediate tube or bearing, F the outer tube or bearing, and G themachine frame. The aforesaid cylindrical holding portion A of the hammeras already mentioned is arranged to lit the bore of the inner tube orbearing D. This holding portion is supported within the tube D by alever a that is clamped by a screw a Fig. 3, to the holding portion Abetween the upper end of the inner tube D and an enlarged portion a" ofthe hammer casing, endwise movement of the holding portion beingprevented by the aforesaid enlarged portion a and a cap a that encirclesthe hammer A and is screwed onto the lower end of the holding portion A.The lever a is arranged to permit of the hammer describing an eccentricor a circular path. For this purpose one end of the lever is slidablymounted in a bearing a sliding on a box (4* pivoted at a to the frame G,the opposite end of such lever being slidably mounted in a bearing athat is rotatably mounted upon the upper end of a shaft H from which theinner, intermediate and outer tubes D, E and F are driven. Rotatablymounted upon the inner tube D is a toothed wheel (Z formed on its underface with teeth (Z for engagement with corresponding teeth formed on oneend of a clutch member J that is slidably mounted upon keys j carried bythe inner tube D. The wheel (Z is driven from the shaft H through theintervention of a toothed wheel (Z that is rotatably mounted upon a pin(Z secured to an arm (Z that is pivotally mount-- ed about the axis ofthe tube D. Gearing with the wheel (Z is another toothed wheel 61 Fig. 3that is also rotatably mounted upon a pin (Z fixed to the aforesaid arm(5*. The

wheel 6Z5 is secured to a toothed wheel (Z which gears with a toothedwheel (Z that is keyed upon the shaft H, the wheels (Z (Z being retainedin gear by a link d Fig. 4, connecting the arm (I with the shaft H. Thisarrangement retains the various wheels in gear while the wheel (Z ismoving toward or away from the shaft H. Fixed on the lower end of theinner tube D is a collar d having a number of radial holes (Z for thereception of a pin or key by means of which the position of the innertube can be rotatably adjusted in relation to the clutch J.

The intermediate tube E is connected to the outer tube F by a screw fadapted to enter one or other of a number of radial holes 0 formed inthe tube E for the purpose of enabling the latter to be secured in oneor other of a number of predetermined positions in relation to the outertube F. Projecting from the upper end of the intermediate tube E areteeth 6 adapted to be engaged or disengaged with corresponding teethformed on the adjacent end of the clutch member J. The latter is mountedin a ring j having oppositely projecting pins j Fig. 4 which engage withslots j formed in a bent lever 7' that is pivoted at 3' to the machineframe. This lever'is actuated to operate the clutch by a handle jmounted upon a stud j which is fixed to the lever j and projects througha slot 9 in the machine frame. The clutch member J is capable of beinglocked with the teeth (Z or with the teeth 0 or of occupying a neutralposition between such teeth. This is conveniently effected by providingthe handle j with a pin j which is caused to engage with suitably spacedholes in the frame G through the action of a spring j situated withinthe aforesaid handle. The outer tube F Fig. 2 is rotatably mounted in abushing 9 carried by the frame G and is provided at its upper end with atoothed wheel f which gears directly with a toothed wheel. f keyed uponthe shaft H and having the same number of teeth as the wheel f.

The gearing for rotating the tubes D and F is so arranged that suchmembers rotate at relatively different speeds. For example the tube Dmay make ten revolutions per minute and the tube F sixty revolutions perminute, the intermediate tube E being employed in the combination shownsolely for adjusting the size of the path described by the hammer. Whenthe clutch J is in engagement with the teeth (Z the tubes D and Frespectively rotate at the above mentioned speeds and the hammerdescribes a spiral path which varies in size in accordance with theposit-ion of the tube E in relation to the tubes D and F. This isclearly illustrated in Figs. 6 to 8. In Fig. 6 the tube E is connectedwith the tube F in such a manner that the thickest portion 6 of the tubeF ooincides with the thickest portion 6 of the tube E. This adjustmentof the tube E causes the hammer to describe the maximum size of spiralas shown in Fig. 9. In Fig. 7, the tube E has been adjusted so that itsthickest portion occupies an angular position in relation to thethickest portion f of the tube F. This adjustment of the tube E producesa spiral of medium size as shown in Fig. 10. In Fig. 8, the tube E hasbeen adjusted so that its thickest portion a? coincides with thethinnest portion f of the tube F with the result that a spiral ofminimum size is produced as shown in Fig. 11. When the tube D is lockedto the tubes E and F by causing the clutch member J to engage with theteeth 6, the hammer describes a circular path as shown in Figs. 12 or13, the size of this path being regulated by adjusting the position ofthe tube E in the manner above described. If desired another eccentrictube could be inserted between the holding portion A of the hammer andthe inner tube D so as to provide for varying the pitch of the spiral,which could be effected by rotatably adjust ing the position of the saidadditional tube in relation to its surrounding tubes.

The shaft H is driven and controlled in the following manner. A sleeve hFig. 2 is slidably mounted upon such shaft and carries at its lower enda key h which engages with a keyway h formed in the shaft. Rigidly fixedto the upper end of the sleeve h is a clutch member 7& having teeth k onits lower face adapted to be put into engagement with teeth Itprojecting from the upper end of a sleeve it that is rotatably mountedupon the sleeve h and is supported in a bearing h carried by the frameG. The teeth h are normally retained out of engagement with the teeth [aon the sleeve h by a spring h which exerts pressure against the lowerend of the sleeve h and retains the latter in its upper position. Thissleeve is actuated to bring the teeth It into engagement with the teethit by a starting lever h Fig. 14 fixed upon a shaft it that is pivotedin the frame G and carries a fork h in which is pivoted a ring it. Thelatter encircles a portion of the sleeve it between a flange hprojecting therefrom and a collar it that is secured to the lower end ofthe sleeve. The shaft H in the example shown is rotated at sixtyrevolutions per minute by a bevel wheel h keyed upon the sleeve h andgearing with a bevel wheel it fixed on a main driving shaft h on whichare mounted a fast and loose pulley [L and h respectively. When themachine is set in motion the clutch member it is caused to engage withthe driving sleeve it while the shaft H makes six revolutions, duringwhich time the cycle of operations performed by the machine has beencompleted, and in order'to disengage the clutch member and drivingsleeve at the completion of such movement, a toothed wheel 7L isrotatably mounted upon a bushing it fixed upon the shaft H. This toothedwheel is formed with a recess h which is normally engaged by a tooth hprojecting from the clutch member if. In the example shown the toothedwheel 71/ is rotated at seventy revolutions per minute. This isconveniently effected by a toothed wheel h that is rigidly fixed uponthe shaft H and gears with a toothed wheel 72.. The latter is fixed to atoothed wheel it which gears with the toothed wheel 72, and is rotatablymounted upon a pin it carried by the machine frame G. As soon as thestarting lever 72,0 is actuated to put the machine in motion, thetoothed wheel h rotates in advance of the shaft H and retains the clutchmember if in engagement with the sleeve he as long as the upper surfaceof the projection 71, bears against the lower surface it of the wheelit. hen the shaft H has made six revolutions the recess it comesdirectly over the projection k which is then forced into the recess bythe spring lbs with the result that the clutch member IL3 isautomatically disengaged from the driving sleeve h and the machinestopped.

The hammer A is supplied with air through a pipe a leading from a valvecasing a Fig. 15 to which air is supplied from a suitable compressorthrough a pipe a Fig. 16. Situated in the casing a are two valves a andZ) of which the valve a controls the supply of air to the hammer throughthe pipe a and the valve 6 the supply of air to a cylinder 6 through apipe N, Fig; 2. This cylinder contains a plunger to which is pivoted asupport If for the reception of a die anvil b which is recessed at itsupper end to hold the die 13. Encircling the hammer A is a controllingshoe a formed with an aperture a adapted to act as a guide or supportfor the upper end of the die. The controlling shoe a is slidably mountedin a casing a that is bolted to the frame G, a retaining ring a securingthe controlling shoe in place and permitting its removal from the casingwhen required. Interposed between the controlling shoe and the casing isa cushioning ring a which absorbs the rebound of the anvil produced bythe effects of the hammering operation upon the compressed air in theanvil cylinder 6. The lower end of the controlling shoe a isadvantageously formed with a projection 0;" for an adjusting screw awhich limits the movement of the anvil b in one direction.

Projecting from the controlling shoe a is a finger a Fig. 15, whichsupports the lower end of a spring controlled rod a that is slidablymounted in the frame G.

Hinged to the upper end of this rod is a lever a F ig. 17, pivoted at ain a guide 60 Fig. 3, carried by the frame G. This lever is formed witha pair of surfaces (4 and a adapted to constitute a fulcrum for afloating lever a hereinafter referred to as the hammer valve lever, andalso with a lifting surface a for a purpose hereinafter described. Thehammer valve lever a is provided at one end with a roller (4 which restsupon a cam a that is secured to the toothed wheel (Z Figs. 2 and 3. Theother end of the lever terminates in a T head a which is slidablymounted in a guide a carried by the frame G. This end of the lever issupported by the stem of the hammer operating valve a and such valve isnormally retained in its closed condition by a spring a. The stem of theanvil valve 6 is connected to a rod 6 which tends to retain such valvein its closed position through the intervention of a spring 6 This rodis connected by a chain 6 to a hand control lever I) that is pivotedupon a shaft 6 This lever is provided with a spring controlled handle I)adapted to be engaged either by hand or automatically with an arm I)that is keyed upon a rotatably mounted shaft 6 Another arm o is slidablykeyed upon such shaft and when in use is placed in alinement with a pin12 projecting from the anvil b lVhen the machine is in its inoperativecondition the anvil b may be caused to occupy a suitably inclinedposition for enabling a die to be readily inserted into the recessedportion of the anvil. The controlling shoe a occupies its lower positionwith the result that the spring controlled rod a retains the surfaces aand (1- on the lever a out of engagement with the hammer valve lever a,and the spring a retains the hammer valve a in its closed condition. Theanvil valve 6 is also retained in its closed condition by reason of thefact that the pin 6 on the anvil 6 occupies a position away from the armI) thereby allowing the spring 6 to lift the rod 6 and anvil valve I).hen a die has been placed upon the anvil, the latter is turned to thevertical position shown in Fig. 2. During the completion of thismovement the pin 6 comes into contact with the arm I) and operates thelever b to lower the anvil valve 7) through the chain .72 and rod 6 tothe open position shown in Figs. 15 and 16, whereupon air passes to thecylinder 6 and lifts the anvil b thereby causing the die B to be grippedtightly between the anvil and the controlling shoe a after it has raisedthe latter to its top position. This movement of the controlling shoe alifts the rod a, through the finger a and causes the operating surfacesat a of the lever a to embrace the hammer valve lever a and to act as afulcrum therefor. As soon as the anvil valve 6 is opened a supply of airpasses from the chamber a through a pipe (6 Fig. 2 to an annular chamber(4 extending around the hammer A and retains the latter in its uppermostposition until the machine is set in operation. This is effected bydepressing the starting lever handle h so as to bring the teeth It onthe clutch member it? into cngagementwith the teeth if on the sleeve 71-with the result that the shaft H is driven and imparts a rotary movementto the sleeves D, E and F through the gearing already described therebycausing the hammer to describe a spiral path presuming that the clutchmember J is locked to the wheel (Z, the size of such spiral path beingpreviously determined by adjusting the position of the sleeve E inrelation to the inner and outer sleeves D and F in the manner alreadydescribed. It will be seen with reference to Fig. 3, that after themachine has completed one cycle of operations the lifting portion of thecam a comes into close proximity to the roller 62 on the hammer valvelever a with the result that the hammering operation is commenced assoon as the machine is again'set in action, and is continued until thehammer has described any of the paths indicated in Figs. 8, 9 and 10.Each of these paths is completed when the tubes E and F have made threeand a half revolutions, the re maining two and a half revolutionscausing the hammer to describe a spiral path in the opposite directionduring which time the hammering operation is preferably discontinued byso arranging the cam (0 that its recessed or lower surface comesunderneath the roller (L28 on the hammer valve lever a and allows thehammer valve to close. After the tubes E and F have made six revolutionsthe cycle of operations is completed, the hammer has returned to theposition at which it commences the hammering operation and the aforesaidprojection h on the clutch member It has entered the recess 72 in thetoothed wheel h thereby disconnecting the aforesaid clutch member withthe sleeve 72, and so stopping the machine.

In order to render the machine applicable to hammering between the rowsof eyes of a die plate such as C, Fig. 18 after the same has beenhammered around its eyes, an oscillatory anvil c is substituted for theanvil upon which the plate was supported during the last mentionedhammering operation and the arm I) is moved along the shaft 6 so as toclear the anvil 0 during its oscillations. The upper surface of theanvil 0 constitutes an arc of a circle that is described from the pivotof the anvil holder 6 and projecting from such surface are a number ofstuds 0 adapted to engage with the dieopenings on the underside of thedie plate. The latter is supported between the aforesaid anvil and aguide 0 which is substituted for the controlling shoe which was employedduring the hammering of the spiral paths around the eyes of the dieplate, the said controlling shoe acting in a similar manner to theaforesaid controlling shoe a. WVhen the controlling shoe is removed, therod a Fig. 15, is no longer supported by the pin a and the spring thatencircles such rod returns the latter to its lowest posit-ion therebybringing the lifting surface a on the lever 64 directly under the hammervalve lever 4 with the result that its roller (Z28 is lifted out ofengagement with the cam a which can therefore revolve without im partingany motion to such lever. To limit the upward movement of the plunger 6in order to prevent the die plate being gripped between the anvil andthe guide 0 when air is admitted to the cylinder 7), the plunger b isformed with a projection 0 adapted to engage with an adjustable stop 0*.The anvil 0 is connected by a link 0 to a slotted lever c which ispivoted at c to the machine frame and engages at its lower end with acam groove 0 formed in a drum 0". This drum is rotatably mounted upontwo sleeves 0 0 which interlock with each other at their inner ends andare rotatably mounted upon a fixed shaft 0 Rigidly secured to the sleeve0 is a toothed wheel 0 which gears with a toothed wheel 0 formed on asleeve 0 which is rotatably mounted upon a shaft 0 Rigidly fixed uponthe sleeve 0 is a belt pulley 0 connected by a belt 0 to a belt pulley 0that is rigidly secured upon the main driving shaft h". The sleeve 0terminates at its outer end in a toothed wheel 0 which gears with atoothed wheel 0 that is keyed or otherwise fixed upon a toothed wheel 0which is rotatably mounted upon the shaft 0 and gears with teeth 0formed on one end of the drum 0*. In the arrangement shown the gearingis so proportioned that the drum makes siX revolutions per minute butobviously it can be driven at any other appropriate speed. As the dieplate C is hammered while in a hot condition and is inconveniently largeand heavy to manipulate with one hand, the hammer and anvil valves arand b are provided with a treadle control. For this purpose the hammervalve lever a is connected by a chain 0 with a foot lever 0 and the rod7) which is fixed to the stem of the anvil valve 6 is connected by achain 0 with a foot lever 0 Both of these levers are normally retainedin their upper posit-ions by springs such as 0 0 represents a gravitycontrolled catch arranged to retain the anvil valve foot lever a" in aposition for holding the anvil valve open until the hammer valve footlever 0 is depressed. When this takes place the said lever bears againstan inclined portion 0 of the catch and withdraws the latter from theanvil valve foot lever which is then returned to its normal or topposition by the spring 0 In elfecting the hammering operation betweenthe rows of eyes in. the die plate the hammer is preferably caused todescribe a circular path by moving the above mentioned handle 7' to lockthe teeth on the clutch member J with the teeth 6 on the sleeve E so asto cause the sleeves D, E and F, to revolve together. The anvil valvefoot lever c is then depressed to admit air to the cylinder Z) whichraises the anvil until the projection 0 on the plunger 6 engages withthe stop 0. The die plate C is then placed upon the anvil in such amanner that the end aperture in the first row of eyes engages with thefirst project-ion 0. The machine is now set in motion by depressing thestarting lever handle it", and the hammer valve foot lever is depressedwhereupon the hammer commences to deliver a series of blows in acircular path and as the anvil and die plate are slowly traversed pastthe hammer the said blows are delivered upon the die plate in a seriesof curved lines corresponding approximately to those indicated in Fig.20. After the die plate has been traversed past the hammer in onedirection, it is shifted to bring the end aperture of the succeeding rowof eyes into engagement with the last projection 0* on the anvil C, sothat on the return movement of the latter the blows are deliveredbetween the first and second rows of eyes. This shifting of the dieplate is performed at the end of each traverse until the plate has beentraversed to and fro across the hammer six times whereupon the hammeringoperation is completed and the machine automatically comes to astandstill by reason of the aforesaid projection 72, entering the recessh in the toothed wheel It, the hammer being put out of operation by theattendant allowing the hammer valve foot lever to return to its normalor top position.

WV hat I claim and desire to secure by Let ters Patent of the UnitedStates is 1. In a hammering machine, a hammer, a holding portiontherefor, eccentric tubes surrounding the holding portion andcontrolling the position of the hammer, a support for the holdingportion, a slidably mounted bearing in which one end of the support isslidably mounted, and a rotatably mounted bearing in which the other endof the support is slidably mounted.

2. In a die hammering machine, a hammer, a die support, means forautomatically moving the hammer in a curved path in relation to the diesupport, and means for moving the die support across the path of thehammer.

8. In a die hammering machine, a hammer, eccentric carrying meanstherefor, a die support, a support for the hammer, and rotatably mountedbearings in which the ends of the hammer support are slidably mounted.

4:. In a die hammering machine, a hammer, a plurality of eccentric tubessurrounding the hammer and controlling its position, and means forimparting a rotary motion to the tubes.

5. In a die hammering machine, a hammer, a plurality of eccentric tubessurrounding the hammer and controlling its position, and means forcausing the tubes to rotate at different relative speeds.

6. In a die hammering machine, a hammer, a plurality of eccentric tubessurrounding the hammer and controlling its position, and means forcausing the tubes to rotate at the same speed.

7. In a die hammering machine an eccentric rotatable hammer carrier, afluid pressure hammer carried thereby, a die support, a hammer support,bearings in which the hammer support is slidably mounted, means forrotating the hammer carrier, means for raising the die support, andmeans for moving the die support across the path of the hammer.

8. In a die hammering machine, a fluid pressure hammer, a rotatableeccentric carrier therefor, a die support, a fluid pressure cylinder inwhich the die support is mounted, means for rotating the hammer carrier,and means for moving the die support across the path of the hammer.

9. In a die hammering machine, a fluid pressure hammer, a die support, afluid pres-' sure cylinder carrying the die support, means whereby thesupply of pressure fluid to the die support is controlled by the act ofbringing the die support approximately into line with the hammer andmeans for moving the latter in a curved path in relation to the diesupport.

10. In a die hammering machine, a fluid pressure hammer, a die support,a fluid pressure cylinder carrying the die support, means for preventingthe hammer from being operated until a die is inserted between the diesupport and the hammer, and means for moving the hammer in a curved pathin relation to the die support.

11. In a die hammering machine, a fluid pressure hammer, a die support,a fluid pressure cylinder carrying the die support, a controlling shoecapable of movement toward and away from the die support and meansconnected with the latter and the controlling shoe for causing the dieto be secured in position between such parts by the pressure fluid whichholds the die support in its working position.

12. In a die hammering machine, a fluid pressure hammer, a die support,means for moving the hammer in a curved path in relation to the diesupport, and means for automatically stopping the machine when thehammer has completed its predetermined movement.

13. In a die hammering machine, a fluid pressure hammer, a die support,means for automatically moving the hammer around and toward the axis ofthe die support, a valve for controlling the supply of fluid pressure tothe hammer and means for automatically opening and closing the valve.

14. In a die hammering machine, an eccentric hammer carrier, a hammerholder carried thereby, means for rotating the hammer holder carrier, acap carried by the holder, a hammer slidable in the cap, and fluidpressure means for controlling the operations of the hammer.

15. In a die hammering machine, a hammer carrier comprising inner,outer, and intermediate eccentric tubes, a hammer carried thereby, andmeans for rotating the inner and outer tubes at different speeds tocause the hammer to travel in a spiral path.

16. In a die hammering machine, a ham mer, a hammer carrier comprisinginner and outer eccentric tubes and an intermediate eccentric tube forrelatively adjusting the outer and inner tubes, and means for rotatingthe inner and outer tubes at diflerent speeds to cause the hammer totravel in a spiral path.

In testimony whereof I affix my signature in presence of tWo witnesses.

NICHOLAS KING TURNBULL.

Witnesses:

NORMAN I-I. SHEARD, J AS. STEWART Bnoanroo'r.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, I). G.

